Thanks !!
@Mike .. a lot of data,27 hours is a crazy thing for me, i think i have done 2/3 times at all. But this is a really hard one ... in my web page there's a link to APOD from Adam Block. Also if you search there's few image that show coloured this dust. I found in my data a green color that i removed due to the airglow but this happen only for the very weak signal. I found one image that show the whole area and a maroon dust, this, i think this is a great image:
http://www.astroimager.net/Page-RHA-CCD-340.html
I can stay more conservative, but the dust is present on the luminance data. In any case the RC gain a lot of details ..